JANUS? 2020 Hand-Held Computer (4MB) - Intermec

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nuggethelCODE39 CODE39Troubleshooting
Networking or Communicating With the Reader
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This table lists problems that may occur when the reader is communicating with another device.
Note: If you have problems with your RF network, see your JANUS RF documentation.
Problem Solution
Communications problems occur only
when you connect the optical link
adapter to a reader and no external
power source is attached.
The communications application cannot
communicate.
You attempt to load PHIMEC, and the
reader displays the message, “Comm
port not available.”
When you use the Multi-Drop protocol
and 19.2 bps baud rate, the
communications application times out or
waits indefinitely on a receive request,
and the 9154 Multi-Drop Line
Controller’s fault light turns on.
You experience problems with the reader
display when you run terminal
emulation (TE) on the reader. For
example, the prompt disappears after
you run a program.
The reader may not be in good contact with the optical link
adapter. Inspect the spring contacts and contact surfaces on the
optical link adapter for signs of corrosion or contamination. If
necessary, clean the contacts with a cotton swab and an alcoholbased
solvent. Other solvents may damage the plastic housing.
Verify that the reader and the other device are using the same
communications protocol and parameter settings. If they do not
match, change them and restart the communications
application.
Make sure the reader’s optical port, communications dock, and
optical link adapter are clear of foreign material. Wipe the
optical port window with a damp cloth to remove any material
that may be blocking the light from the LEDs.
You may need to reset the UART FIFO control register. For
help, see “Specifying a Value for the FIFO Control Register” in
Chapter 6.
The PHIMEC protocol handler has not been loaded into
memory. You attempted to load PHIMEC to a COM port other
than COM1.
Load the protocol handler again. For help, see “Loading and
Unloading a Protocol Handler” in Chapter 6.
The packets are too large (over 30 bytes) for the JANUS reader
to handle at the 19.2 bps baud rate. Lower the baud rate to
9600 bps.
When you run TE on the reader, the CONFIG.SYS file loads
ANSI.SYS. ANSI.SYS interacts with IM_DISP.EXE, causing
unpredictable effects on the reader’s display.
Remark out IM_DISP.EXE in the AUTOEXEC.BAT file while
you use TE. For help editing AUTOEXEC.BAT, see “Learning
How to Change the Contents of Drive C” in Chapter 3.
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